Gives you optimal performance CX7 is designed and built to last. However, with time, the filters will need to be replaced in order to maintain the cleaners performance. The filter is a high quality filter designed to fit your CX7 and to maintain its good performance. Changing the filter on a regular basis will provide your cleaner with a strong airflow and high suction power. The original filter will help you to maintain maximum dust pick up. The filter is easy to change and handle. It is also washable. Fits all CX7CX7-2-30DB, CX7-2-30BP, CX7-2-30GM, CX7-2-35TM, CX7-2-35RM, CX7-2-35Ö, CX7-2-35FF, CX7-2-45BM, CX7-2-45IM, CX7-2-B360, CX7-2-S360, CX7-2-I360 , CX7-2-45AN, CX7-2-45WM2x filter